<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮-->
      <el-row>
        <el-col>
          <el-button @click="addDialogVisible = true" type="primary" plain>添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 添加角色对话框 -->
      <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
        <!-- 内容主体区域 -->
        <el-form :model="addForm" ref="addFormRef" label-width="70px">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="addForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="addForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addUser">确 定</el-button>
        </span>
      </el-dialog>

      <!-- 角色列表区域-->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列-->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : 'bdbottom', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二三级权限-->
              <el-col :span="19">
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop','vcenter']"
                  v-for="(item2, i2) of item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3, i3) of item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列-->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              plain
              @click="showEditDialog(scope.row.id)"
            >编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete" plain>删除</el-button>
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              plain
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 编辑角色的对话框 -->
    <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <el-form :model="editForm" ref="editFormRef" label-width="70px">
        <el-form-item label="角色名">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限对话框-->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件-->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        highlight-current
        :default-checked-keys="defkeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色列表数据
      rolelist: [],
      addDialogVisible: false,
      // 添加角色的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      editForm: {},

      //编辑按钮显示与隐藏
      editDialogVisible: false,

      //控制分配权限对话框显示与隐藏
      setRightDialogVisible: false,
      //所有权限的数据
      rightslist: [],
      //   树形控件
      treeProps: {
        label: 'authName',
        children: 'children'
      },

      //默认选中节点的id值数组
      defkeys: [],
      //当前点击分配权限的角色id
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    //获取所有角色列表的数据
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) return this.$message.error('获取角色失败')
      this.rolelist = res.data
    },

    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 监听添加用户对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮，添加新用户
    addUser() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)

        if (res.meta.status !== 201) {
          this.$message.error('添加用户失败！')
        }

        this.$message.success('添加用户成功！')
        // 隐藏添加用户的对话框
        this.addDialogVisible = false
        // 重新获取用户列表数据
        this.getRolesList()
      })
    },

    // 展示编辑用户的对话框
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('roles/' + id)

      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败！')
      }

      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改角色对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 修改角色信息并提交
    editUserInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 发起修改角色信息的数据请求
        const { data: res } = await this.$http.put(
          'roles/' + this.editForm.roleId,
          {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc
          }
        )

        if (res.meta.status !== 200) {
          return this.$message.error('更新用户信息失败！')
        }

        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 提示修改成功
        this.$message.success('更新用户信息成功！')
      })
    },

    //根据id删除对应的权限
    async removeRightById(role, rightId) {
      //弹出提示是否删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      if (confirmResult !== 'confirm') return this.$message.info('取消删除')

      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )

      if (res.meta.status !== 200) return this.$$message.error('删除失败')

      role.children = res.data
    },
    //展示分配权限对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      //获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200)
        return this.$message.error('获取权限数据失败')
      this.rightslist = res.data

      //递归获取三级节点id
      this.getLeafKeys(role, this.defkeys)

      this.setRightDialogVisible = true
    },
    //通过递归形式 获取角色下所有三级权限的id 保存到defkeys数组中
    getLeafKeys(node, arr) {
      //如果当前node节点不包含children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      //循环node里面所有数组，每循环一项拿到一个子节点item 然后根据item再次调用递归函数 把当前item当做一个节点传进去
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },

    //监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defkeys = []
    },
    //点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if (res.meta.status !== 200) return this.$message.error('分配权限失败')
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="stylus" scoped>
.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}

.el-col {
  margin: 7px;
}
</style>